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Established 2004

Ruddlesden geotechnical

Ruddlesden geotechnical provides ground investigation, geotechnical consultancy and contamination assessment services.

Based in Exeter, but covering the whole of the UK, albeit primarily concentrated in the South West, Ruddlesden geotechnical was formed in 2004.

Ruddlesden geotechnical works on behalf of a wide client base, including local, regional and national housing developers, housing associations, commercial developers, building contractors, structural and civil engineers, architects, building consultants, quantity surveyors, local authorities and private individuals.

Development projects range from single dwellings and extensions to large housing estates, multi-storey flats, offices, industrial units, roads, slopes, schools, hospitals and basements.

The services and projects listed on this web-site provide an indication of those undertaken by Ruddlesden geotechnical, but others are carried out. If your requirement is not readily identifiable on this web-site, please contact us as we may still be able to help you.

  • AGS
  • Constructionline
  • CSCS
  • SMAS
  • ECFC trust

Latest news

Recent projects

  • Latest news

    16 Apr 2026

    Coastal Slope Stability Assessment

    Geoff Davis has recently been in his element, carrying a slope stability assessment for a holiday park that has recently seen some quite dramatic ground movements.One thing that this project has highlighted is that for all the new technologies that are available to help us understand the ground, including LiDAR, drone surveys, remote sensing and inclinometers, all of which we intend to use on this site, they are of little use if the ground model is not understood. And this understanding of geology and geomorphology only come from a combination of education and experience.It is hoped that our understanding of the landslide processes at this complex site will allow us to predict possible future behaviour and assist in developing a long-term strategy for the future of the holiday park and its management.

    Coastal Slope Stability Assessment
    Coastal Slope Stability Assessment

  • Recent projects

    Validation Testing in Somerset to Satisfy NHBC and Local Authority

    Ten years after carrying out the original contamination investigation and assessment, Ruddlesden geotechnical returned to the site to carry out the validation testing of the remedial works. The validation testing included hand-excavated trial pits in garden areas, to obtain samples for laboratory testing to confirm the cleanliness of the capping soil in garden areas and to provide a photographic record of the depth of the capping layer, as well as documentary evidence of the gas protection measuresand upgraded water supply pipes. The site visit was attended promptly and the laboratory testing was expedited, following which the report was issued without delay, to ensure they were no problems with sales.

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  • Recent projects

    Deep Bore Soakaway Testing, Devon

    A combination of in-situ constant and variable (falling) and constant head testing was undertaken to provide information for the design of a number of deep-bore soakaway drains at a residential development site in Torbay. Deep-bore soakaway drains had previously been recommended by Ruddlesden geotechnical following observations made during conventional soakaway testing in accordance with BRE DG 365. Previous geotechnical investigation and near-surface geophysics, undertaken as part of a solution feature investigation, had indicated that the use of conventional shallow soakaway drainscould lead to the wash-out of near surface soils through underlying cavernous limestone, potentially leading to an increased long-term subsidence risk of the ground. Rotary open-hole boreholes were undertaken to form the deep bore soakaway at depths specified by the consulting engineers, based on information provided by Ruddlesden geotechnical from an earlier phase of geotechnical investigation, which included a period of groundwater monitoring. Additional in-situ constant head permeability testing was also undertaken following the installation of the deep bore soakaways to verify the design parameters and to confirm the performance of the deep bore soakaways. All testing was undertaken in accordance with BS EN ISO 22282-2:2012.

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